package com.dawn.seckilldemo.utils;

import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.stereotype.Component;



@Component
public class MD5Util {
    public  static String md5(String src){
        return DigestUtils.md5Hex(src);
    }

    private static final String salt="1a2b3c4d";

    //加密加盐
    public static String inputPassToFromPass(String inputPass){
        String str = "" +salt.charAt(0)+salt.charAt(2)+inputPass+salt.charAt(5)+salt.charAt(4);
        return md5(str);
    }


    //这个盐随机生成
    public static String fromPassToDBPass(String fromPass,String salt){
        String str =  salt.charAt(0)+salt.charAt(2)+fromPass+salt.charAt(5)+salt.charAt(4);
        return md5(str);
    }
    /**
     * 进行两次加密加盐   最后存到数据库的 md5（ md5（pass+salt1）+salt2）
     * salt1是前端进行的
     * salt2是后端进行的随机生成
     */
    public static String inputPassToDBPass(String inputPass,String salt){
        String fromPass = inputPassToFromPass(inputPass);
        String dbPass=fromPassToDBPass(fromPass,salt);
        return dbPass;
    }

    public static void main(String[] args) {
        //d3b1294a61a07da9b49b6e22b2cbd7f9
        System.out.println(inputPassToFromPass("123456"));
        System.out.println(fromPassToDBPass("d3b1294a61a07da9b49b6e22b2cbd7f9","1a2b3c4d"));
        System.out.println(inputPassToDBPass("123456","1a2b3c4d"));
    }

}
